Foundation pile high strain detection anti-eccentric centering device

Abstract

The invention discloses a foundation pile high-strain detection anti-eccentricity centering device, and relates to the technical field of pile foundation detection, the foundation pile high-strain detection anti-eccentricity centering device comprises a rack and a heavy hammer arranged above a pile foundation, and a winding drum and a first driving part driving the winding drum to rotate are arranged above the rack; a heavy hammer is arranged on the rack, a mounting frame which moves in the vertical direction of the rack and is connected with a cable of the winding drum is arranged above the heavy hammer, a clamping assembly for fixing the heavy hammer is arranged below the mounting frame, the clamping assembly is in sliding connection with the mounting frame, and the rack is provided with a positioning assembly which enables the heavy hammer and the pile foundation to be located on the same axis. The first driving piece drives the winding drum to wind the cable to lift the clamping assembly, the heavy hammer is clamped and lifted to a certain height through the clamping assembly, then the clamping assembly loosens the heavy hammer, the heavy hammer freely falls to impact a pile foundation, and the situation that the heavy hammer directly falls after being lifted through the cable and the winding drum, so that the cable pulls the winding drum on a crane to rotate is reduced; and the impact force of the heavy hammer is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of pile foundation detection, and in particular to a pile foundation high strain detection and anti-eccentricity centering device. Background Art

[0002] As we all know, high strain testing for pile foundation experiments is a testing method for determining the vertical compressive bearing capacity and pile integrity of a single pile. During the experiment, a heavy hammer is used to impact the top of the pile, and the velocity and force time-history curves at the top of the pile are measured. The curves are analyzed using wave theory, and then the ground bearing capacity of the construction project is tested to determine whether it can meet the construction requirements.

[0003] During the pile foundation test, a heavy hammer is required to impact the pile foundation. The traditional impact method is to lift the heavy hammer by a crane, and then loosen the cable to make the heavy hammer fall, so as to complete the impact work. With respect to the above-mentioned related technologies, the inventor believes that when the heavy hammer falls, the heavy hammer pulls the drum on the crane to rotate through the cable, so that the drum and the cable affect the natural fall of the heavy hammer, resulting in a decrease in the impact force of the heavy hammer. Summary of the invention

[0004] The purpose of this application is to provide a high-strain detection and anti-eccentricity centering device for pile foundations, so as to improve the problem that when the weight falls, the weight pulls the drum on the crane to rotate through the cable, thereby causing the drum and the cable to affect the natural fall of the weight, resulting in a decrease in the impact force of the weight.

[0005] The present application provides a pile foundation high strain detection and anti-eccentricity centering device, which adopts the following technical solution: A high-strain detection and anti-eccentricity alignment device for pile foundations comprises a frame and a weight arranged above the pile foundation, a drum and a driving member for driving the drum to rotate are arranged above the frame, a mounting frame which moves along the up and down directions of the frame and is connected to the cable of the drum is arranged above the weight, a clamping assembly for fixing the weight is arranged below the mounting frame, the clamping assembly is slidably connected to the mounting frame along the length direction of the mounting frame, the clamping assembly moves upward with the mounting frame to lift the weight and then causes the weight to fall naturally for impact, and the frame is provided with a positioning assembly which enables the weight and the pile foundation to be on the same axis.

[0006] By adopting the above technical scheme, a drum and a driving member are installed on the frame, the cable on the drum is connected to the mounting frame, and the driving member drives the drum to reel in the cable to lift the mounting frame and the clamping assembly, and the weight is clamped and lifted by the clamping assembly, and the weight is lifted to a certain height, and then the clamping assembly releases the weight to allow the weight to fall freely to impact the pile foundation, thereby reducing the possibility that the weight is directly lifted by the cable and drum and then falls, causing the cable to pull the drum on the crane to rotate, resulting in the drum and cable affecting the natural fall of the weight, resulting in the possibility of a decrease in the impact force of the weight.

[0007] Optionally, the clamping assembly includes a movable frame located below the mounting frame and slidably connected along the length direction of the mounting frame, a fixed rod is arranged above the weight, and two clamping claws are slidably arranged below the movable frame, and the two clamping claws are close to each other to connect with the fixed rod to fix the weight.

[0008] By adopting the above technical solution, the mobile frame in the clamping assembly is slidably connected with the mounting frame, so that the mobile frame moves along the length direction of the mounting frame, and the clamping claw slidably connected below the mobile frame is connected to the fixed rod on the heavy hammer. The heavy hammer is lifted by connecting the clamping claw with the fixed rod, which facilitates the fixation of the heavy hammer and reduces the possibility that the heavy hammer will be separated from the clamping claw due to the shaking of the heavy hammer after the mobile frame lifts the heavy hammer.

[0009] Optionally, a guide groove 1 is provided under the mounting frame, the movable frame is provided with a guide block which fits with the inner wall of the guide groove 1, the guide block is located in the guide groove 1 and has a connecting hole, a reciprocating screw rod which is rotatably provided on the inner wall of the guide groove 1 and is adapted to the connecting hole, and the movable frame is provided with a driving component 2 which drives the reciprocating screw rod to rotate and makes the movable frame move back and forth.

[0010] By adopting the above technical scheme, a guide block that fits with the inner wall of the guide groove is arranged on the movable frame, the reciprocating screw is arranged in the connecting hole of the guide block and is rotatably connected with the inner wall of the guide groove, the reciprocating screw is driven to rotate by the driving member 2, so that the movable frame moves in the guide groove 1, and the movable frame moves together with the weight through the clamping claw, so that the weight and the pile foundation are on the same axis, and the offset between the weight and the pile foundation is reduced, which makes it easy for the impact position of the weight on the pile body to be offset when it falls, thereby affecting the detection accuracy.

[0011] Optionally, a guide groove 2 is provided under the movable frame, and a screw with opposite rotation directions is rotatably provided on the inner side wall of the guide groove 2. The two clamps are respectively located at both ends of the screw and are provided with mounting holes threadedly connected to the screw. The movable frame is provided with a driving component 3 which drives the screw to rotate so that the two clamps are against each other to fix the fixed rod.

[0012] By adopting the above technical scheme, a screw with opposite rotation directions at both ends is provided in the guide groove 2 of the mobile frame, and the two clamping jaws are respectively threadedly connected to the two ends of the screw. When the driving member 3 drives the screw to rotate forward, the two clamping jaws in the guide groove 2 approach each other at the same time, so that the two ends of the clamping jaws are simultaneously against each other to fix the fixing rod of the heavy hammer. When the driving member 3 drives the screw to reverse, the two clamping jaws move away from each other at the same time, so that the heavy hammer falls directly, reducing the possibility of deviation of the heavy hammer when it falls due to the different loosening speeds of the two clamping jaws.

[0013] Optionally, a slide groove is provided on one side of the frame close to the mounting frame, sliding blocks are provided on both sides of the mounting frame and fit with the inner side walls of the slide groove, and limit plates are rotatably provided on both sides of the mounting frame to abut against the side walls of the frame, and the limit plates are bent along the side walls of the frame. Driving cylinders are provided on both sides of the mounting frame, and the side of the limit plates away from the frame is rotatably connected to the driving rod of the driving cylinder, and the shell of the driving cylinder is rotatably connected to the mounting frame.

[0014] By adopting the above technical scheme, a slide groove is opened on one side of the frame close to the mounting frame, and the two sides of the mounting frame are slidably connected to the slide groove through sliders, and are rotatably connected to limit plates on both sides of the mounting frame. The limit plates are bent along the side walls of the frame, and the limit plates are driven by the driving cylinder to rotate toward the side walls of the frame so that the limit plates are abutted against the side walls of the frame to fix the mounting frame, thereby reducing the possibility that the mounting frame slides along the frame due to a failure of the reel after the heavy hammer is lifted. At the same time, the mounting frame can be fixed when the mounting frame rises to other required heights, and the height at which the heavy hammer falls can be adjusted, so as to facilitate the collection of detection results after different impacts on the pile foundation.

[0015] Optionally, a protrusion is provided on one side of the frame close to the limiting plate 1, and a friction pad corresponding to the protrusion is provided on one side of the limiting plate 1 close to the protrusion.

[0016] By adopting the above technical solution, a protrusion is arranged on the side of the frame close to the limit plate to increase the friction between the protrusion and the limit plate one, and a friction gasket corresponding to the protrusion is arranged on the side of the limit plate one close to the protrusion to further reduce the possibility of the mounting frame sliding off the frame after the heavy hammer is lifted.

[0017] Optionally, the positioning assembly includes two positioning plates located on both sides of the pile foundation, the two positioning plates are arranged in an arc surface on one side close to the pile foundation, and a connecting rod connected to the frame is arranged on one side of the positioning plate away from the pile foundation.

[0018] By adopting the above technical solution, positioning plates that are against the pile foundation are arranged on both sides of the pile foundation, and the side of the positioning plate close to the pile foundation is arranged in an arc surface, so that the positioning plate can better fit the side wall of the pile foundation, so that the pile foundation is located in the center position of the frame and is coaxial with the heavy hammer.

[0019] Optionally, the frame is provided with a connecting groove, the connecting rod is inserted into the connecting groove and is slidably connected to the frame, an elastic member 1 is arranged on the outer side of the connecting rod between the side of the positioning plate away from the pile foundation and the frame, a signal sensor is arranged on the side of the positioning plate away from the pile foundation, a receiver corresponding to the signal sensor is arranged under the movable frame, and the receiver is electrically connected to the driving member 2.

[0020] By adopting the above technical solution, the connecting rod is inserted into the connecting groove and slidably connected to the frame. The positioning plate is pushed against the pile foundation by an elastic member 1 arranged between the frame and the positioning plate. A signal sensor is arranged on the side of the positioning plate away from the pile foundation. The signal emitted by the signal sensor is received by a receiver under the mobile frame, so that the driving member 2 can drive the mobile frame to make the weight and the pile foundation on the same axis, further reducing the possibility of weight deviation.

[0021] Optionally, the frame is provided with a baffle plate corresponding to the outer side wall of the weight above the positioning plate, and both ends of the baffle plate are bent along the side wall of the weight, and a plurality of grooves are opened on the side of the baffle plate close to the weight, and balls that are in contact with the side wall of the weight are rolled in the grooves.

[0022] By adopting the above technical scheme, a baffle corresponding to the outer wall of the weight is arranged above the positioning plate of the frame. After the weight falls and impacts the pile foundation, the baffle blocks the weight to prevent the weight from tilting and sliding on the top of the pile body, colliding with the side wall of the pile foundation and damaging the pile body; a plurality of grooves are opened on the side of the baffle close to the weight, and the ball bearings are embedded in the grooves to reduce the friction between the weight and the baffle when it falls, reduce the influence of the impact force on the weight, and facilitate the downward movement of the mobile frame to lift the weight again.

[0023] Optionally, a fixing groove is provided on one side of the frame close to the baffle, the baffle is provided with a positioning rod inserted into the fixing groove, and a second elastic member is provided on the outer side of the fixing rod between the baffle and the frame.

[0024] By adopting the above technical solution, a positioning rod inserted into a fixing groove provided in the frame is arranged on the baffle plate, and a second elastic member is arranged on the positioning rod between the baffle plate and the frame. When the heavy hammer hits the baffle plate after impacting the pile foundation, the impact of the heavy hammer is absorbed by the second elastic member, thereby reducing the vibration displacement of the frame caused by the heavy hammer hitting the baffle plate.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. Install the drum and driving member 1 on the frame, connect the cable on the drum to the mounting frame, and drive the drum to wind up the cable to lift the mounting frame and the clamping assembly by the driving member 1, clamp and lift the weight through the clamping assembly, and lift the weight to a certain height, then release the weight by the clamping assembly, so that the weight falls freely to impact the pile foundation, reducing the possibility that the weight is directly lifted by the cable and drum and then falls, so that the cable pulls the drum on the crane to rotate, causing the drum and cable to affect the natural fall of the weight, resulting in a decrease in the impact force of the weight; 2. A screw with opposite rotation directions at both ends is arranged in the guide groove 2 of the mobile frame, and two clamping claws are respectively connected with the two ends of the screw by threads. When the driving member 3 drives the screw to rotate forward, the two clamping claws in the guide groove 2 approach each other at the same time, so that the two ends of the clamping claws are simultaneously against each other to fix the fixing rod of the heavy hammer. When the driving member 2 drives the screw to rotate reversely, the two clamping claws are simultaneously away from each other, so that the heavy hammer falls directly, reducing the possibility of deviation of the heavy hammer when it falls due to different loosening speeds of the two clamping claws; 3. A baffle plate corresponding to the outer wall of the weight is arranged above the positioning plate of the frame. After the weight falls and impacts the pile foundation, the baffle plate blocks the weight to prevent the weight from tilting and sliding on the top of the pile body, colliding with the side wall of the pile foundation and damaging the pile body; a plurality of grooves are provided on the side of the baffle plate close to the weight, and the balls are embedded in the grooves to reduce the friction between the weight and the baffle plate when it falls, thereby reducing the impact on the impact force of the weight. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of a pile foundation high strain detection and anti-eccentricity centering device; Figure 2 is a partial cross-sectional view of a pile foundation high strain detection and anti-eccentricity centering device in an embodiment; Figure 3 yes Figure 2 A partial enlarged view of part A.

[0027] In the figure, 1, frame; 11, reel; 12, driving member 1; 13, slide groove; 14, protrusion; 15, connecting groove; 16, fixing groove; 2, weight; 21, fixing rod; 3, mounting frame; 31, guide groove 1; 32, reciprocating screw rod; 33, driving member 2; 34, slider; 35, limit plate 1; 351, friction pad; 36, driving cylinder; 4, clamping assembly; 41, moving frame; 411, guide groove 2; 412, screw rod; 42, clamping claw; 421, mounting hole; 43, guide block; 431, connecting hole; 44, driving member 3; 5, positioning assembly; 51, positioning plate; 52, connecting rod; 53, elastic member 1; 54, signal sensor; 55, receiver; 6, baffle; 61, groove; 62, ball; 63, positioning rod; 64, elastic member 2; 7, pile foundation. DETAILED DESCRIPTION

[0028] The following is combined with Figure 1 -Attached Figure 3 , further details of this application are given.

[0029] A pile high strain detection and anti-eccentricity centering device, referring to Figure 1 and Figure 2, including a frame 1 at the position of the pile foundation 7, a driving member 12 and a drum 11 are fixed above the frame 1 with bolts, the driving member 12 is a driving motor connected to the power supply, a slide groove 13 is provided on the frame 1, the mounting frame 3 is slidably connected to the frame 1 through a slider 34, the cable on the drum 11 is connected to the mounting frame 3, and the driving member 12 drives the drum 11 to retract and release the cable to make the mounting frame 3 move up and down on the frame 1; a clamping assembly 4 for fixing the heavy hammer 2 is provided below the mounting frame 3, and a moving frame 41 of the clamping assembly 4 is slidably connected to the mounting frame 3, a guide groove 2 411 is provided below the moving frame 41, and a bearing is used in the guide groove 2 411 to rotate with screws 412 with opposite rotation directions at both ends, and mounting holes 421 corresponding to the screws 412 are provided on the two clamping jaws 42, and the two The two clamping jaws 42 are respectively mounted on both ends of the screw rod 412 and are threadedly connected to the screw rod 412; when a driving motor 44 as a driving member 3 is installed on the mobile frame 41 to drive the screw rod 412 to rotate forward, the two clamping jaws 42 approach each other at the same time, so that the two ends of the clamping jaws 42 are simultaneously abutted against each other to fix the fixed rod 21 welded on the heavy hammer 2, and the heavy hammer 2 is lifted by the rotation of the drum 11. When the driving member 3 44 drives the screw rod 412 to reverse, the two clamping jaws 42 move away from each other at the same time, so that the heavy hammer 2 falls directly, reducing the possibility of the heavy hammer 2 being offset when falling due to the different loosening speeds of the two clamping jaws 42, and at the same time reducing the possibility that the heavy hammer 2 is directly lifted by the cable and the drum 11 and then falls, causing the cable to pull the drum 11 on the crane to rotate, resulting in the drum 11 and the cable affecting the natural fall of the heavy hammer 2, resulting in the impact force of the heavy hammer 2 decreasing.

[0030] Reference Figure 2 and Figure 3 A guide groove 31 is provided below the mounting frame 3, and a guide block 43 that fits the inner side wall of the guide groove 31 is fixed on the movable frame 41 with bolts. A connecting hole 431 is provided on the guide block 43, and the guide block 43 is rotatably connected with the reciprocating screw rod 32 through a bearing in the guide groove 31 along the length direction of the guide groove 31, so that the reciprocating screw rod 32 passes through the connecting hole 431 on the guide block 43 and is threadedly connected with the guide block 43, and a driving member 2 33 is fixed on the mounting frame 3 with bolts. The driving member 2 33 is a driving motor connected to a power source, and the driving member 2 33 drives the reciprocating screw rod 32 to rotate, so that the guide block 43 moves along the length direction of the mounting frame 3 with the movable frame 41, and the movable frame 41 moves together with the weight 2 through the clamp 42, so that the weight 2 can move to be on the same axis as the pile foundation 7, thereby reducing the possibility that the weight 2 and the pile foundation 7 are offset, which makes it easy for the impact position of the weight 2 on the pile body to be offset, thereby affecting the detection accuracy.

[0031] Reference Figure 1 and Figure 2, the two sides of the mounting frame 3 are rotatably connected with the limit plate 1 35 through the rotating shaft, the limit plate 1 35 is bent along the side wall of the frame 1, and the two sides of the mounting frame 3 are rotatably connected with the shell of the driving cylinder 36 through the protruding rotating shaft, the driving cylinder 36 is electrically connected to the power supply, and the side of the limit plate 1 35 away from the frame 1 is rotatably connected with the driving rod of the driving cylinder 36 through the rotating shaft, and the driving cylinder 36 drives the limit plate 1 35 to abut against the frame 1, so as to fix the mounting frame 3 and reduce the installation. After the mounting frame 3 lifts the heavy hammer 2, there is a possibility that the reel 11 fails and the mounting frame 3 slides down along the frame 1; a plurality of metal protrusions 14 are welded at intervals on the side wall of the frame 1 near the limit plate, and a friction gasket 351 corresponding to the protrusion 14 is fixed by bolts on the side of the limit plate 35 near the protrusion 14, thereby increasing the friction between the protrusion 14 and the limit plate 35, and further reducing the possibility that the mounting frame 3 slides down from the frame 1 after the heavy hammer 2 is lifted.

[0032] Reference Figure 1 and Figure 2 , positioning plates 51 that abut against the pile foundation 7 are arranged on both sides of the pile foundation 7, and the side of the positioning plate 51 close to the pile foundation 7 is arranged in an arc surface, so that the positioning plate 51 can better fit the side wall of the pile foundation 7, so that the pile foundation 7 is located at the center of the frame 1 and is coaxially arranged with the weight 2, and a connecting rod 52 is welded on the side of the positioning plate 51 away from the pile foundation 7, and the connecting rod 52 is inserted into the connecting groove 15 opened in the frame 1, and a spring as an elastic member 53 is arranged between the frame 1 and the positioning plate 51 to push the positioning plate 51 to abut against the pile foundation 7, and a signal sensor 54 is installed on the side of the positioning plate 51 away from the pile foundation 7, and a receiver 55 corresponding to the signal sensor 54 is installed under the mobile frame 41, and the receiver 55 is electrically connected to the driving member 2 33 through a flexible wire, and the receiver 55 receives the signal sent by the signal sensor 54, so that the driving member 2 33 can drive the mobile frame 41 to make the weight 2 and the pile foundation 7 on the same axis, further reducing the possibility of the weight 2 offset.

[0033] Reference Figure 1 and Figure 2A baffle plate 6 corresponding to the outer side wall of the weight 2 is arranged above the positioning plate 51 of the frame 1. The baffle plate 6 is bent along the side wall of the weight 2. A fixing groove 16 is provided on the side of the frame 1 close to the baffle plate 6. A positioning rod 63 inserted into the fixing groove 16 is welded on the baffle plate 6. After the weight 2 falls and impacts the pile foundation 7, the baffle plate 6 blocks the weight 2 to prevent the weight 2 from tilting and sliding on the top of the pile body and colliding with the side wall of the pile foundation 7 to damage the pile body; a positioning rod 63 is arranged on the positioning rod 63 between the baffle plate 6 and the frame 1. An elastic member 64 is installed, which is a spring. When the heavy hammer 2 hits the baffle 6 after impacting the pile foundation 7, the impact of the heavy hammer 2 is absorbed by the elastic member 64, thereby reducing the vibration displacement of the frame 1 caused by the heavy hammer 2 hitting the baffle 6; a plurality of grooves 61 are provided on the side of the baffle 6 close to the heavy hammer 2, and the balls 62 are embedded in the grooves 61, thereby reducing the friction between the heavy hammer 2 and the baffle 6 when it falls, reducing the influence of the impact force on the heavy hammer 2, and at the same time facilitating the downward movement of the movable frame 41 to lift the heavy hammer 2 again.

[0034] The implementation principle of the embodiment of the present application is: In actual operation, the driving member 3 44 on the mobile frame 41 drives the two ends of the screw 412 to rotate, so that the clamping claws 42 at both ends of the screw 412 approach each other and clamp and fix them with the fixed rod 21 on the weight 2, and the driving member 12 drives the reel 11 to rotate the winding cable to lift the mounting frame 3, the mobile frame 41 and the weight 2 along the frame 1 to a certain height, and the driving cylinder 36 on the mounting frame 3 pushes the limit plate 1 35 to abut against the protruding member 14 on the side wall of the frame 1 to fix the mounting frame 3 to prevent the mounting frame 3 from slipping. At the same time, the mounting frame 3 can be fixed when it rises to other required heights to adjust the height at which the weight 2 falls; the positioning plate 51 below the frame 1 abuts against the pile foundation 7, and the signal transmission on the positioning plate 51 The sensor 54 transmits a signal to the receiver 55 on the mobile frame 41. After the receiver 55 receives the signal, the driving member 2 33 on the mounting frame 32 drives the reciprocating screw rod 32 to rotate so that the mobile frame 41 moves and moves the weight 2 to a position on the same axis as the pile foundation 7, thereby reducing the offset between the weight 2 and the pile foundation 7 and making it possible for the impact position of the weight 2 on the pile body to be easily offset; then the driving member 3 44 drives the screw rod 412 to reverse and make the clamping jaws 42 move away from each other at the same time, so that the weight 2 naturally falls and impacts the pile foundation 7, and the baffle plate 6 located above the pile foundation 7 abuts against the side wall of the weight 2 after the impact is completed, and the baffle plate 6 blocks the weight 2 to prevent the weight 2 from tilting and sliding on the top of the pile body and colliding with the side wall of the pile foundation 7 to damage the pile body. The weight 2 is clamped and lifted by the clamping assembly 4, and the weight 2 is lifted to a certain height. The clamping assembly 4 then releases the weight 2, allowing the weight 2 to fall freely to impact the pile foundation 7, and high-strain detection is performed on the pile foundation 7, thereby reducing the possibility that the weight 2 is directly lifted by the cable and the drum 11 and then falls, causing the cable to pull the drum 11 on the crane to rotate, resulting in the drum 11 and the cable affecting the natural fall of the weight 2, thereby causing the impact force of the weight 2 to decrease.

[0035] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A pile foundation high strain detection and anti-eccentricity centering device, comprising a frame (1) and a weight (2) arranged above the pile foundation (7), characterized in that: A reel (11) and a driving member (12) for driving the reel (11) to rotate are arranged above the frame (1); a mounting frame (3) that moves along the frame (1) in an up-and-down direction and is connected to a cable of the reel (11) is arranged above the weight (2); a clamping assembly (4) for fixing the weight (2) is arranged below the mounting frame (3); the clamping assembly (4) is slidably connected to the mounting frame (3) along the length direction of the mounting frame (3); the clamping assembly (4) moves upward with the mounting frame (3) to lift the weight (2) and then causes the weight (2) to fall naturally for impact; and a positioning assembly (5) is arranged on the frame (1) so that the weight (2) and the pile foundation (7) are on the same axis.

2. The device for preventing eccentricity and centering of pile foundation high strain detection according to claim 1 is characterized in that: The clamping assembly (4) comprises a movable frame (41) located below the mounting frame (3) and slidably connected along the length direction of the mounting frame (3); a fixing rod (21) is arranged above the weight (2); and two clamping claws (42) are slidably arranged below the movable frame (41); the two clamping claws (42) are close to each other to be connected to the fixing rod (21) so as to fix the weight (2).

3. The device for preventing eccentricity and centering of pile foundation high strain detection according to claim 2 is characterized in that: A guide groove (31) is provided below the mounting frame (3); the movable frame (41) is provided with a guide block (43) that fits with the inner side wall of the guide groove (31); the guide block (43) is located in the guide groove (31) and has a connecting hole (431); a reciprocating screw rod (32) that fits with the connecting hole (431) is rotatably provided on the inner side wall of the guide groove (31); and the movable frame (41) is provided with a driving member (33) that drives the reciprocating screw rod (32) to rotate so that the movable frame (41) moves back and forth.

4. The device for preventing eccentricity and centering of pile foundation high strain detection according to claim 3 is characterized in that: A second guide groove (411) is provided below the movable frame (41), and a screw rod (412) with two ends rotating in opposite directions is rotatably provided on the inner side wall of the second guide groove (411). The two clamping jaws (42) are respectively located at two ends of the screw rod (412) and are provided with mounting holes (421) threadedly connected to the screw rod (412). The movable frame (41) is provided with a third driving member (44) for driving the screw rod (412) to rotate so that the two clamping jaws (42) abut against each other to fix the fixed rod (21).

5. The device for preventing eccentricity and centering of pile foundation high strain detection according to claim 4 is characterized in that: A slide groove (13) is provided on one side of the frame (1) close to the mounting frame (3); sliding blocks (34) are provided on both sides of the mounting frame (3) and are fitted with inner side walls of the slide groove (13); a limit plate (35) is rotatably provided on both sides of the mounting frame (3) and is abutted against the side wall of the frame (1); the limit plate (35) is bent along the side wall of the frame (1); a driving cylinder (36) is provided on both sides of the mounting frame (3); a side of the limit plate (35) away from the frame (1) is rotatably connected to a driving rod of the driving cylinder (36); and a shell of the driving cylinder (36) is rotatably connected to the mounting frame (3).

6. The device for preventing eccentricity and centering of pile foundation high strain detection according to claim 5, characterized in that: A protruding piece (14) is arranged on one side of the frame (1) close to the limiting plate (35), and a friction pad (351) corresponding to the protruding piece (14) is arranged on one side of the limiting plate (35) close to the protruding piece (14).

7. The device for preventing eccentricity and centering of pile foundation high strain detection according to claim 1 is characterized in that: The positioning assembly (5) comprises two positioning plates (51) located on both sides of the pile foundation (7); the two positioning plates (51) are arranged in an arc surface on one side close to the pile foundation (7); and a connecting rod (52) connected to the frame (1) is arranged on the other side of the positioning plate (51) away from the pile foundation (7).

8. The device for preventing eccentricity and centering of pile foundation high strain detection according to claim 7, characterized in that: The frame (1) is provided with a connecting groove (15), the connecting rod (52) is inserted into the connecting groove (15) and is slidably connected to the frame (1), an elastic member (53) is provided on the outer side of the connecting rod (52) between the side of the positioning plate (51) away from the pile foundation (7) and the frame (1), a signal sensor (54) is provided on the side of the positioning plate (51) away from the pile foundation (7), and a receiver (55) corresponding to the signal sensor (54) is provided below the movable frame (41), and the receiver (55) is electrically connected to the second driving member (33).

9. The device for preventing eccentricity and centering of pile foundation high strain detection according to claim 8, characterized in that: The frame (1) is provided with a baffle (6) corresponding to the outer wall of the weight (2) above the positioning plate (51); both ends of the baffle (6) are bent along the side wall of the weight (2); a plurality of grooves (61) are provided on a side of the baffle (6) close to the weight (2); and balls (62) are rollingly arranged in the grooves (61) and fit the side wall of the weight (2).

10. A pile foundation high strain detection and anti-eccentricity centering device according to claim 9, characterized in that: A fixing groove (16) is provided on one side of the frame (1) close to the baffle (6); the baffle (6) is provided with a positioning rod (63) inserted into the fixing groove (16); and a second elastic member (64) is provided on the outer side of the fixing rod (21) between the baffle (6) and the frame (1).

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